J/AJ/123/1570 alpha Persei and Praesepe Clusters (Patience+, 2002)
A high angular resolution multiplicity survey of the open clusters
α Persei and Praesepe.
Patience J., Ghez A.M., Reid I.N., Matthews K.
<Astron. J. 123, 1570 (2002)>
=2002AJ....123.1570P 2002AJ....123.1570P
ADC_Keywords: Clusters, open ; Stars, double and multiple ; Stars, variable ;
Keywords: binaries: general -
open clusters and associations: individual (alpha Persei, Praesepe)
Abstract:
Two hundred forty-two members of the Praesepe and alpha Persei
clusters have been surveyed with high angular resolution 2.2µm
speckle imaging on the 3m Infrared Telescope Facility, the 5m Hale,
and the 10m Keck telescopes, along with direct imaging using the
near-infrared camera (NICMOS) aboard the Hubble Space Telescope. The
observed stars range in spectral type from B (∼5M☉) to early M
(∼0.5M☉), with the majority of the targets more massive than
∼0.8M☉. The one quadruple and 39 binary systems detected
encompass separations from 0.053" to 7.28"; 28 of the systems are new
detections, and there are nine candidate substellar companions.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 104 142 alpha Persei sample
table2.dat 104 100 Praesepe sample
table4a.dat 108 21 alpha Persei stellar binaries
table4b.dat 85 9 alpha Persei faint doubles
table5a.dat 133 12 Praesepe binaries
table6.dat 58 152 alpha Persei single stars
table7.dat 86 111 Praesepe single stars
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See also:
I/257 : Proper Motions in Praesepe (Wang+, 1995)
I/68 : Positions & Proper Motions in alpha Per (Fresneau, 1980)
III/55 : Radial Velocities in Open Clusters (Mermilliod 1979)
J/A+A/354/881 : Radial velocities of Praesepe + Hyades Am stars
(Debernardi+, 2000)
J/A+A/375/989 : JHK photometry of Praesepe low-mass stars (Bouvier+, 2001)
J/A+AS/109/29 : Very low mass stars in Praesepe (Hambly+, 1995)
J/A+AS/129/9 : Delta Sct stars in Praesepe (Pena+ 1998)
J/AJ/106/637 : ICCD speckle observations. IX (Mason+, 1993)
J/AJ/106/1080 : Lithium in Praesepe (Soderblom+, 1993)
J/AJ/109/1379 : Praesepe + M 67 spectral standards (Allen+ 1995)
J/ApJ/521/682 : Binaries in the Praesepe and Coma clusters (Abt+, 1999)
J/A+A/298/115 : ROSAT study of Praesepe (Randish+, 1995)
J/ApJ/448/683 : Hyades RASS observations (Stern+ 1995)
J/AN/319/201 : Alpha Per cluster low-mass members. I. (Prosser+, 1998)
J/AN/319/215 : Alpha Per cluster low-mass members. II. (Prosser+, 1998)
Byte-by-byte Description of file: table[12].dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Name (G1)
10- 18 A9 --- BD BD designation
20- 24 I5 --- HD ? HD designation
26- 27 I2 h RAh Right ascension (J2000.0) (1)
29- 30 I2 min RAm Right ascension (J2000.0) (1)
32- 37 F6.3 s RAs Right ascension (J2000.0) (1)
39 A1 --- DE- Declination sign (J2000.0) (1)
40- 41 I2 deg DEd Declination (J2000.0) (1)
43- 44 I2 arcmin DEm Declination (J2000.0) (1)
46- 50 F5.2 arcsec DEs Declination (J2000.0) (1)
52- 57 F6.3 mag Vmag V magnitude (1)
58- 63 F6.3 mag B-V ? B-V colour index (1)
64- 73 A10 --- SpType Spectral type (1)
75- 80 F6.3 mag Kmag ? 2MASS K magnitude
81 A1 --- n_Kmag [e] e: Not in 2MASS database
82 A1 --- l_logLX Limit flag on logLX
83- 87 F5.2 [10-7W] logLX ? X-ray luminosity (2)
89 A1 --- l_logLX2 Limit flag on logLX2
90- 94 F5.2 [10-7W] logLX2 ? X-ray luminosity from Randich et al.,
1996A&A...305..785R 1996A&A...305..785R
96 A1 --- l_vsini Limit flag on vsini
97- 99 I3 km/s vsini ? Rotational velocity
101-104 A4 --- Tel Telescope (3)
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Note (1): From C.F. Prosser (ftp://cfa-ftp.harvard.edu/pub/stauffer/clusters )
or SIMBAD
Note (2): X-ray luminosity from:
table1: Prosser et al., 1996AJ....112.1570P 1996AJ....112.1570P
table2: Randich & Schmitt, 1995, Cat. J/A+A/298/115 and
Stern et al., 1995, Cat. J/ApJ/448/683
Note (3): Telescopes as follows:
I = IRTF
P = Palomar
K = Keck
H = HST
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Table 3: Observing summary
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Telescope Date Obs Technique
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alpha Per
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Palomar 1997 Oct 8 45 Speckle
1997 Dec 4-9 43/3 Speckle +
shift-and-add/shift-and-add only
IRTF 1998 Feb 18-20 14/33 Speckle +
shift-and-add/shift-and-add only
HST 1998 Feb 28;
1998 Jul 25; 33 Imaging
1998 Aug 8, 23, 26-28, 31
Keck 1999 Jan 6-7 7 Speckle + shift-and-add
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Praesepe
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Palomar 1995 Nov 12-13 8 Speckle
1996 Jan 8-9 26 Speckle
1998 Feb 18-20 20/23 Speckle +
shift-and-add/shift-and-add only
IRTF 1999 Feb 13-15 35 Speckle + shift-and-add
Keck 1999 Jan 6-7 11 Speckle + shift-and-add
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Byte-by-byte Description of file: table4a.dat table4b.dat table5a.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Name (G1)
9- 10 A2 --- m_Name Multiplicity index on Name
12- 18 A7 --- Tel Telescope
20- 29 A10 "YYYY/MM/DD" Date Observation date
31- 35 F5.3 arcsec Sep Separation
37- 41 F5.3 arcsec e_Sep rms uncertainty on Sep
43- 49 F7.3 deg PA Position angle
51- 55 F5.3 deg e_PA rms uncertainty on PA
57- 61 F5.3 mag DF140W F140W (1.3µm) detection limit for unseen
companions for the single stars
63- 67 F5.3 mag e_DF140W rms uncertainty on DF140W
69- 72 F4.2 solMass M1 ? Mass of the first component
73 A1 --- n_M1 [G] G: Giant
74- 77 F4.2 solMass M2 ? Mass of the second component
79- 83 F5.3 --- q ? Mass ratio, M2/M1
85 I1 --- NComp ? Number of component
87-133 A47 -- Com Comments (G2)
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Byte-by-byte Description of file: table6.dat table7.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Name (G1)
10- 16 A7 --- Tel Telescope
18- 27 A10 "YYYY/MM/DD" Date Observation date
29- 32 F4.2 mag DF140W ? F140W (1.3µm) detection limit for
companions at a separation of 0.15"
34- 37 F4.2 --- q ? Mass ratio at 0.15"
38 A1 --- n_q [G] G: giant
40 A1 --- qlim Mass ratio limit
42- 86 A45 --- Com Comments (G2)
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Global notes:
Note (G1): Nomenclature:
alpha Persei: AP nnn = Cl* Melotte 20 AP nnn,
Prosser et al., 1996AJ....112.1570P 1996AJ....112.1570P
HE nnnn = Cl Melotte 20 nnnn,
Heckmann et al., 1956AN....283..109H 1956AN....283..109H
Praesepe: KW nnn = Cl* NGC 2632 KW nnn, Klein Wassink, 1927PGro...41....1K 1927PGro...41....1K
A nnnn = Cl* NGC 2632 Art nnnn, Artiukhina, 1971SoSht.172....3A 1971SoSht.172....3A
Note (G2): Comments:
Single (S), binary (B), or triple (T), and separation or period:
AW99: Abt & Willmarth, 1999, Cat. J/ApJ/521/682
ADS: Aitken, 1932ADS...C......0A 1932ADS...C......0A
B91: Bolte, 1991ApJ...376..514B 1991ApJ...376..514B
B&C: Burkhart & Coupry, 1989A&A...220..197B 1989A&A...220..197B
IDS: Jeffers & van den Bos, 1963IDS...C......0J 1963IDS...C......0J
M: Mason et al., 1993, Cat. J/AJ/106/637
MM99: Mermilliod & Mayor, 1999A&A...352..479M 1999A&A...352..479M
M&A: Morrell & Abt, 1992ApJ...393..666M 1992ApJ...393..666M
P&W: Peterson & White, 1984AJ.....89..824P 1984AJ.....89..824P
P: Prosser, 1992, Cat. V/80
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History:
From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 13-May-2002